Originally Posted by
ayrshiredude
I realise that any miles on my Diamond club acc will be moved over to BA exec club but what will happen after then with each months accrewed miles from my BMI credit card?
To be clear, from the 3rd of July there will be a transfer mechanism for you to move any miles you want back and forward between Diamond Club destination miles and BAEC Avios.
But this won't happen automatically.
Everything that has been said is that you will be able to move any you want in either direction 1:1. For as long as diamond club remains around, your card will presumably continue to credit to bmi DC, and you can move them to BAEC whenever you want.
EDIT:
cristo beat me to it.